Home / 20,307.20-28,010.06-13,243.18

Finding the Fourth Proportional to 20,307.20, 28,010.06 and 13,243.18

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Solution

The fourth proportional to 20,307.20, 28,010.06 and 13,243.18 is: 18,266.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.20 : 28,010.06 = 13,243.18 : x
  2. Step 2: Convert to fraction form
    20,307.20/28,010.06 = 13,243.18/x
  3. Step 3: Cross multiply
    20,307.20x = 28,010.06 × 13,243.18
  4. Step 4: Simplify right side
    20,307.20x = 370,942,266.39
  5. Step 5: Solve for x
    x = 370,942,266.39/20,307.20
  6. Step 6: Final answer
    x = 18,266.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.